I'd give Sportsman's a call and see what they have in stock before I spent $2.50 a gallon for gas to check, unless you just want to shop!!
It wasn't even good for 100yds on mine with the rear sight all the way at the top of the ramp, I swapped out the .584" tall factory 17A front sight for a .404" tall 17A sight, several others had the same problem, but for others it worked fine for 100yds+, don't remember specifically how far tho.
Tim